骨干集集合属性(用于 url) [英] Backbone set collection attribute (for the url)

问题描述

我需要将一个 id 传递给一个集合以在 url 中使用(例如/user/1234/projects.json)，但我不知道如何做到这一点，一个例子会很棒.

I need to pass an id to a collection for use in the url (e.g. /user/1234/projects.json) but am not sure how to do this, an example would be wonderful.

我的应用程序的结构方式是在启动时拉取并呈现用户"集合，然后我希望在单击用户时将他们的文档"从服务器拉入新集合并在新视图中呈现.问题是将用户 ID 放入文档集合中以提供文档的相关 URL.

The way my application is structured is on launch a collection of 'users' is pulled and rendered, I then want when a user is clicked their 'documents' are pulled from the server into a new collection and rendered in a new view. The issue is getting the user id into the documents collection to give the relevant URL for the documents.fetch().

我想我明白了，这是一个例子:

think I've got it, here is an example:

  //in the the view initialize function     
  this.collection = new Docs();
  this.collection.project_id = this.options.project_id;
  this.collection.fetch();

  //in the collection
  url: function() {
     return '/project/api/' +this.project_id+'/docs';
  }

推荐答案

您的用户集合 url 应设置为/user.一旦设置好，您的模型就应该利用该 url 来发挥他们的魔力.我相信(不完全肯定)如果模型在集合中，调用 'url' 方法将返回/user/:id.因此，您所有典型的 REST-ish 功能都将在/user/:id"上使用.如果你想对关系做一些事情(用户有很多文档)，那就是一种冲洗和重复.因此，对于您的文档集合(这对用户来说是正确的?)，您需要将 url 设置为user_instance.url/documents".

Your user collection url should be set to /user. Once that's set, your models should utilize that url in order to do their magic. I believe (not completely positive) that if a model is in a collection, calling the 'url' method will return /user/:id. So all your typical REST-ish functionality will be utilized on '/user/:id'. If you are trying to do something with a relationship (a user has many documents) it's kind of rinse and repeat. So, for your documents collection (which belogs to user correct?) you'd set the url to 'user_instance.url/documents'.

要显示与主干模型的一对多关系，您可以执行以下操作(将 urlRoot 升级到主干 0.5.1):

To show a one to many relationship with a backbone model, you'd do something like this (upgrade to backbone 0.5.1 for urlRoot):

var User = Backbone.Model.extend({
    initialize: function() {
        // note, you are passing the function url.  This is important if you are
        // creating a new user that's not been sync'd to the server yet.  If you
        // did something like: {user_url: this.url()} it wouldn't contain the id
        // yet... and any sync through docs would fail... even if you sync'd the
        // user model!
        this.docs = new Docs([], {user_url: this.url});
    },
    urlRoot: '/user'
});

var Doc  = Backbone.Model.extend();

var Docs = Backbone.Collection.extend({
    initialize: function(models, args) {
        this.url = function() { args.user_url() + '/documents'; };
    }
});

var user = new User([{id: 1234}]);
user.docs.fetch({ success: function() { alert('win') });

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